I replaced both u-joints on my front shaft, which solved a clunk but not the godforsaken squeak I've been chasing for months. It sounds like brake or bearing squeaks between 10 and 14mph, and it even stops when I brake, so I pulled all four calipers, removed any stuck rocks, and regreased everything. I repacked the front wheel bearings. I once thought it was coming from the front, but I'm no longer sure that's the case. I think it actually tends to make the noise on uphill runs.
I put it on stands to spin the wheels, and even ran it at 10mph off the ground, but it won't make the noise unloaded. What can I do to narrow down where this is coming from? I thought about taping a cell phone to the diffs and the t-case, but I don't think that will tell me anything more than I already know.